Installation & Repair Services

MacUpgrades.co.uk offers a wide range of fixed price upgrades and repairs for your Apple computers. You can drop in to our offices in Sawston, Cambridge or if you are not local you can either have us collect or send in your computer yourself. Sameday fitting is available for most items, contact us for details. We also offer on site installation services and training on your premises.

Serial Number Search

Enter your serial number into the box below for specific upgrades for your machine. Each upgrade has been tested in the machine we list it for. Compatability is 100% guaranteed or your money back.

Serial Number:

How to find your serial number in software

You can find your Mac's serial number in Apple System Profiler: Select the Apple Menu > About This Mac, then (depending on the version of OSX you are running) click the System Report button or the More Info button. This brings up System Profiler, and on the Hardware Overview that is displayed by default you should see your serial number, and be able to copy/paste it. The procedure does vary slightly between different versions of OSX.

If you can't boot your Mac

If your Mac is not working, the serial number is printed on the computer casing but the location varies. Here are the main locations of serial numbers on Apple computers.

Find your Mac by its Model Identifier

Your Mac's Model Identifier can be found in System Profiler. You can use the drop-down menus above to be taken to a page that displays upgrades specifically for your exact model.

This tool is also available on its own page, with a list of all Model IDs here.

OWC DDR2 PC6400 SODIMM - 4GB (1 x 4GB)

£58.67 + vat(£70.40)

Stock Status:Available.

Condition: Brand New

This is a 4GB module of DDR2 PC6400 SODIMM. This OWC branded module is specifically intended to boost machines up to 6GB total which otherwise max out at 4GB in 2 x 2GB modules. Note: that since getting 6GB RAM requires using modules of different sizes, you will not get any benefits from RAM pairing when using it.

OWC part code: OWC6400DDR2S4GB.

It is a SODIMM (Small Outline Dual Inline Memory Module) memory chip, which is generally used in laptop computers, but also in many Mac desktops. The RAM is DDR2 RAM. This is similar to standard DDR (Double Data Rate) RAM in that data is sent on both the rising and falling edge of each clock pulse. DDR2 RAM however has upgraded components which allow it to run at higher clock frequencies than standard DDR.

To see if this RAM is compatible with your machine, please see the compatibility list below. If you wish to find out which RAM is compatible with a specific Mac, you can find your model via various methods in the top navigation bar.